Profile: Stony Brook Manufacturing Company Inc offers trussed sign structures, traffic signal poles, railings, traffic supports along with miscellaneous steel, aluminum and stainless steel fabricated products. Our sign structures includes overhead truss & cantilever which are usually fabricated of A 53, A 252 or A 500 steel pipe. Both types can be made of either steel or aluminum. We can supply a full line of anchor bolts. We fabricate a complete range of posts supporting everything from the smallest sign on a single post to larger multiple post installation. The brands we offer include Valmont Industries™.